Present the following multiplicative comparison ratios one at a time. Create a context to define the units for each ratio. Focus on ratios with the same units. For each ratio, determine the scale factor. How many times greater. Encourage students to use a model to justify their thinking.
A possible context to consider would be leveraging the height of sunflowers (or other plants).

For the first problem in this string, your prompt might sound like:

One rosebush is currently 32 cm tall, while a tulip is 8 cm tall. How many times taller is the rosebush than the tulip? What fraction of the whole rosebush is the height of the tulip?

If you begin with a context comparing lengths, then you might consider continuing with length comparisons.

32 : 8

42 : 6

55 : 10

30 : 9

As an additional opportunity to extend, you can also explore the smaller quantity relative to the larger if you feel it is appropriate based on student readiness. For example, 32 is four times greater than 8 or you could say that 8 is one fourth as great as 32.

32 cm ÷ 8 cm per group = 4 groups

8 cm ÷ 32 cm per group = ¼ groups

You can learn more about rates, ratios and the roadmap to proportional relationships through the course: The Concept Holding Your Students Back.

While you can facilitate this math talk by verbally stating the context and modelling student thinking on a chalkboard/whiteboard or with digital ink, you might find it helpful to leverage the visual math talk videos with built in “pause” prompts to allow for student thinking time.